Abstract
Design and development of superconducting structures require basic research on electromagnetic fracture mechanics. In the theory of brittle fracture in a strong magnetic field, usually we consider linear electromagnetic elastic solutions of crack problems. Examples including analysis of electromagnetic elastic crack problems are reviewed to show the effect of magnetic field on the mechanical behavior of cracked materials. Many electrically conducting materials are used in magnetic and electric current fields. First, the electromagnetic elastic problems of conducting cracked materials are analized to show the effect of electromagnetic force. The current flow is disturbed by the presence of the crack and the electromagnetic body force is caused by the interaction between the magnetic field and the disturbed current. If the electrically conducting material is used in the strong magnetic field, we must consider the effect of induced current. Secondly, scattering of time harmonic waves by a crack in an electrically conducting material under a magnetic field is analized to show this effect. If a ferromagnetic material is used in a magnetic field, we must consider the effect of induced magnetization. Lastly, the fracture and deformation of a soft ferromagnetic material in a magnetic field is investigated to show this effect.
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